Ink distributing hand stamp



Aug. l5, 1967 G. M; vosxasurecs` INK DISTRIBUTING HAND VSTAMP 2 Sheets-Sheet l Filed Nov.

vena/mi' y La 6 f l 6 @yf/V 7655* Aug. l5, 1967 G. M. vosBURG INK DISTRIBUTING HAND STAMP 2 Sheets-Sheet 2 Filed Nov. 1964 y @@@@@@@@@@@@@w Q United States Patent O 3,335,660 INK DISTRIEUTING HAND STAMP Guy M. Vosburg, Park Ridge, Ill., assignor to Weber Marking Systems, Inc., a corporation of Illinois Filed Nov. 5, 1964, Ser. No. 409,124 8 Claims. (Cl. 101-125) This invention relates to a new and improved ink distributing hand stamp.

The imprinting of stencils requires uniform expression of ink simultaneously over thefull surface of the stencil. There have 'been Vand are many hand stamps which -attempt to accomplish this result. In most of these prior devices the 'complexity `of the hand stamps has made them unduly costly. Many elements have been used to cause the ink to be dispersed substantially uniformly over a rectangular surface `and yet the devices tended to clog and even permit the ink to run to one side of the stamp causing smudges of ink simultaneously with an almost total absence of ink in other portions of the same imprinting.

It is a primary object of this invention to provide a novel hand stamp capable of expelling ink substantially uniformly over the full rectangular surface thereof.

An important object of this invention is to provide a simple, economical and yet an effective novel hand stamp for causing the uniform expression of ink therefrom over its full imprinting surface.

Another object is to provide a novel integral assembly of a porous flexible ink distributing pad, an ink reservoir, and a rigid backing member.

Another object is to provide unique means in an -assembly of the foregoing paragraph for uniformly supporting said flexible pad on said backing member with a negligible blocking of the pores of said pad.

Another object is to provide ink reservoir means which will baffle ink therein to minimize any liow of said ink to any side of said reservoir when said reservoir is tilted into avertical plane.

Another and further important object of this invention is the provision of an ink expelling hand stamp for the printing of stencils in which an ink reservoir wall being substantially co-extensive with the printing surface of the hand stamp is provided with a plurality `of closely adjacent integral projections thereon with a compressible pad attached to the apices of the projections.

Another Iand still further important object of this invention is to supply a hand stamp for imprinting stencils which comprises a `backing plate formed with a plurality `of closely adjacent projections of uniform height and gradually diminishing cross sectional lare-a located on one side of the backing plate and defining tortuous paths in and around the projections for uniformly dispersing ink over the stamp.

A still further important object of this invention is to provide a compressible pad material fastened to the -apices of a plurality of closely spaced lapart projections on a backing plate to deiine an ink chamber for a hand stamp.

Still another important object of this invention is to provide a novel hand stamp of two elements in which one of the elements is a relatively rigid plastic member `and the other element is -a flexible foamed porous elastomer material fastened to the rst part and together comprising a hand stamp which is capable of expelling ink uniformly throughout the cut portions of a stencil which may be applied to the underside of the compressible part.

Still another important object of this invention is to provide a novel flat hand stamp printer incorporating the ink dispersing qualities as set forth in the objects herein.

Another 1and still further important object of this invention is the provision of a novel rocker type hand stamp printer incorporating the ink dispersing qualities as set forth in the objects herein.

Other and further important object and advantages will become `apparent from the disclosures in the following specification and accompanying drawings.

In the drawings:

FIGURE l is an end elevational view of a stencil printing hand stamp.

FIGURE 2 is a front elevational view of the hand stamp of FIGURE 1 with portions thereof in section to show the interior construction.'

FIGURE 3 is a bottom plan view yof the hand stamp backing plate of this invention and as taken on the line 3--3 of FIGURE 2.

FIGURE 4 is a greatly enlarged `sectional view and detail of the baffles of the hand stamp of this invention as taken on the line 4-4 yof FIGURE 3.

FIGURE 5 is a cross 4sectional view of a rocker type of hand stamp incorporating the principles of this invention.

FIGURE 6 is a bottom plan view of the rocker hand stamp base as shown in FIGURE 5.

FIGURE 7 is an end View of the hand ystamp of FIG- URE 5.

FIGURE 8 is a cross sectional View of a further modified form of rocker hand stamp of this invention.

FIGURE 9 is a detail perspective View of the rocker hand stamp of FIGURE 8 and particularly showing the end thereof.

General description The invention is an integral arrangement of a porous flexible ink distributing pad which permits ink to slowly seep therethrough, an ink reservoir on top of said pad wherein the reservoir is provided with certain means acting as baiiles to minimize any flow of ink to any side thereof when the reservoir is tilted into a vertical plane and further acting as passageway means to direct ink from a central reception point over the entire upper surface of the pad, and a rigid impervious backing member which defines the reservoir with the upper surface of the pad and which uniformly supports and secures the entire area of the pad against bulging by ink, `against lateral shifting or rippling, or against sagging, all without blocking any more than a negligible amount of the pores in the upper surface of the pad.

As shown in the drawings:

The reference numeral 10 indicates generally a squeeze type bottle used concurrently as a hand stamp handle and an ink reservoir. The squeeze bottle handle 10` is inverted with its top in substantially sealing engagement `with an upwardly projecting sleeve-like member 11 which is in turn fastened to a hand stamp frame member 12. The frame `member 12 is generally rectangular in shape and is equipped with a peripheral skirt 1.3 which defines a box or tray-like member to receive the hand stamp backing plate 14 of this invention. The backing plate 14 is preferably made of a rigid plastic material and is similarly rectangular in shape and of a size to be snugly inserted into the tray formed by the frame 12. Thumb screws 15 and 16 preferably disposed on opposite sides of the bottle receiving sleeve 11 are adapted to pass through the frame member 12 and threadedly engage the body of the rigid plastic backing member 14 as shown at 17 and 18. As shown in the drawing the screws 11 and 18 threadedly engage the internally threaded holes in the plastic backing plate 14. It should be understood that nuts could be encapsulated within the plastic backing plate 14 in order to provide greater holding ability of the cooperative screw and nut means. Similarly, screw studs could be molded within the plastic backing plate 14 and project upwardly for engagement by thumb nuts in order to hold the constituent elements of the hand stamp of this invention together. These details have not been depicted in the drawing inasmuch as they are not considered to be of an inventive nature and are only incidentally shown in order to provide the environment for the ink dispersing mechanism of the hand stamp of this invention.

The lower surface of the backing plate 14 is equipped with a plurality of closely spaced apart baies or projections 19. These projections 19 are best shown in FIG- URES 2, 3 and 4 and are characterized by their decreasing or diminishing in cross sectional area as they project downwardly. A greatly enlarged detail of the projections 19 is shown in FIGURE 4 and it is apparent that the periphery of each projection is part of a cone and the apices thereof are rounded or spherical in shape as shown at 191;. It is contemplated that the ink dispersing mechanism of this invention will be utilized in both a flat bott tomed hand printer such as depicted in FIGURES 1 to 4 of the accompanying drawing and also in a rocker type or curved bottomed hand printer shown in FIGURES 5 to 9 of the drawing. However, the function of the ink dispersing devices in the two devices is identical. In general the projections 19 might be said to be pyramidal, conical or semispherical in nature with the lower rounded surfaces of the apices of the projections lying in a single plane either at or curved to which a flexible or compressible foamed elastomer pad 20 having numerous porous cells is attached. The plastic backing plate 14 is preferably of the type which can be softened and made tacky with the application of a solvent thereto.

In the construction of the hand stamp of this invention the apices of the projections 19 and the lower edges of an integral peripheral skirt or rim 21 of a height substantially the same as the height of the projections 19 may have a solvent applied thereto thus causing the under surface of the backing plate 14 to become tacky and adhesive in character. Immediately thereafter the compressible, porous elastomer cellular pad 20 is applied to the under surface of the backing plate to thereupon form a composite hand stamp of backing plate 14 and compressible pad 20. A chamber 22 is formed between the backing plate and the compressible pad within the contines of the peripheral rim 21. The chamber 22 is broken up into numerous passageways in and about the projections 19 so that ink owing from the bo-ttle handle downwardly through the sleeve bushing 11 and thence through an opening 23 in the backing plate 14 is distributed throughout the chamber 22 with its maze of projections 19 and thence outwardly through the compressible porous cellular rubber-like material 20. The small surfaced apices of the projections 19 minimize to a great extent the obstructing of the open cells in the top surface of the compressible pad 2t) thereby permitting ink to enter the pad 20 substantially uniformly over the full area of the pad. The peripheral skirt 21 is used as an attaching flange accommodating the gluing of a pad covering cloth as will be subsequently described.

There are a number of advantages gained by the cementing of the exible pad to the backing plate and particularly in the manner shown and described. One of these advantages lies in the fact the ink entering the chamber 22 cannot cause a bulging of the iiexible pad away from the backing plate. Another advantage is the preventing of the flexible pad from wrinklingr or having lateral shifting relative to the backing plate. A still further advantage lies in the fact that even though the flexible pad is fastened to the backing plate over substantially its full surface only a minimum of the pores of the tiexible pad are blocked to the entrance of ink. However in certain instances it may be desirable to merely place the sponge rubber pad against the plurality of projections and then rely on the fastening of the cloth covering to hold the pad in proper position.

When ink is forced downwardly from the squeeze bottle 10 through the opening 23 and into the chamber 22 it is caused to take tortuous paths in and about the maze of baffles or projections 19 so that ink is quickly available over the full surface of the pad for outward expression through the cellular compressible pad 20. There is a substantial difference in time needed to fill the entire chamber 22 with ink as against the time necessary to have the ink ow to one side thereof merely by tilting or turning the hand stamp over on its side. This is true because of the admission of the ink to the chamber 22 it is under pressure by reason of the squeezing of the bottle 10 whereas the ink is only flowing under the influence of gravity when the hand stamp is tilted. Thus even when the hand stamp of this invention is tilted on its side the ink in the chamber 22 will not quickly tiow to that one side of the pad because of the maze of projections 19.

The hand stamp also includes a cloth fabric 24 which covers the bottom surface of the compressible pad 20 and extends upwardly and around the sides for the purpose of being attached by mechanical means, glue, or adhesives to the peripheral surfaces of the skirt 21 of the backing plate 14. It is preferable that the depending skirt 13 of the frame member 12 cover a portion of the upwardly projecting edges 25 of the fabric covering 24 especially when the attaching means is a glue or cement to prevent peeling of the fabric from the backing plate 14.

The weave and texture of the threads of the fabric covering 24 are determined by the desired degree of ow of ink therethrough. The fabric covering readily accepts a stencil thereover and with the proper texture and weave, ink will iiow in a clean, sharp manner through the stencil at the cut portions thereof.

In the operation of the device of this invention the combination handle and ink reservoir bottle 10 is squeezed causing ink within the bottle to be placed under pressure and discharged from the bottle and through the opening 23 in the plastic backing plate 14 for prompt filling into and around the projections 19. Ink thus fills the entire chamber 22 which is co-extensive with the rectangular surfaces of the backing plate 14 and the compressible pad member 20. From the chamber 22 the ink seeps through the porous cells of the foamed elastomer pad 20 and thence through the fabric covering 24 where it is available for the imprinting of cut stencils which are applied thereover. As previously explained the hand stamp of this invention comprises -a generally two-part stamp, one part being the backing plate and the other part being the compressible pad member which abuts and is caused to be secured to the apices of the closely adjacent projections such that an ink chamber is formed therebetween which extends over the full surface of the compressible pad and yet has a suiiicient number of obstructions within the chamber 22 so as to avoid the ready flow by gravity of ink within the chamber to one side thereof.

As shown in FIGURES 5 through 9 there are depicted rocker types of hand printers as opposed to the flat type of hand printer of FIGURES 1 through 4. FIGURES 5, 6 and 7 show one form of rocker type of hand printer While FIGURES 8 and 9 show and describe a modified form of rocker type printer.

The rocker printer of FIGURES 5, 6 and 7 is provided With a handle 30 which is preferably an inverted, squeeze type bottle which carries a supply of ink. The handlebottle 30 is preferably removably attachable to a bushing 31 which forms a part of a metal plate 32. A plastic body member 33 constitutes the base or main frame member of the hand stamp of this invention. Threaded studs 34 and 35 are molded within the plastic member 33 land extend upwardly so that the metal plate 32 and its unitary bushing 31 may be fastened by means of thumb screws 36 and 37 to the screw studs 34 and 35 to thus rigidly hold the handle 30 and its backing plate 32 to the main body 33 of this hand stamp.

The body 33 is preferably made of a plastic material and molded so that it forms sharp lateral side edges 38 and 39 as particularly shown in FIGURE 7. This body member 33 corresponds to the member 14 in the flat printer device of FIGURES 1 through 4. The underside of the base member 33 is provided with a plurality of depending projections 40 which vary in length so that the underside of the lower ends of the projections form a smooth convex curve 41 extending from one lateral side to the other lateral side. Each projection 40 is preferably conical in shape such as shown at 40a so that its cross sectional area diminishes as it progresses downwardly. 'Ihe underside of each projection is also preferably provided with a semi-spherically shaped bottom forming apieces to which a compressible foamed elastomer pad 42 may be attached.

The sponge rubber-like pad 42 may be cemented to the spherical apices 40b in the manner described for the attachment of the foamed elastomer pad 20 to the spherical apices 19b of the projections 19 in the flat printer of FIGURES l to 4. Such cementing may be accomplished by applying `a plastic solvent to the lower ends of the projections for making Vthe apices soft and tacky. The compressible foamed elastomer pad 42 may then be easily attached to the projections. In the persent invention it is also contemplated that the sponge rubber-like pad 42 would merely be placed against the undersides of the projections 40 without any actual cementing to each apex. In this instance the pad Would be caused to adhere to the undersides of the projections by the firm holding of a cloth covering as shown at 43. The cloth covering 43, provided with metal V-shaped clips 44 and 45 extending along its lateral edges is removably attached to the body 33 by the V-clips engaging the angled side edges 38 and 39. Regardless of the manner in which the sponge rubberlike pad 42 is held against the underside of the body 33 with its curve forming projections, its purpose is to receive ink from the handle reservoir 30. End walls 46 and 47 which follow the curved contour of the underside of the projections 40 are provided on the body 33 to prevent ink passing outwardly from the ends of the rocker type of hand printer.

The central portion of the body 33 immediately beneath the bushing 31 has a hole 48 through which ink may pass from the reservoir into the body 33 of the hand printer. The hole 48 tapers outwardly as it progresses `downwardly as shown at 49. The space around each of -the projections 40 and Within the confines of the sides and ends of the body 33 define a reservoir 50 for ink. In the `device as shown ink is initially deposited in the reservoir 50 by asqueezing of the bottle 30; The ink quickly disperses throughout this maze of projections 40 which function as baffles to prevent the undesired flow of all the ink in the hand printer to either one side or one end in l the event the hand printer is turned on its side or end. The

bale construction insures good distribution of ink throughout the surface of the hand printer.

In the same manner as for the flat printer the operation of the rocker type of printer of this invention contemplates `the use of a stencil on the underside of the cloth covering 43 and by means of pressure exerted on the hand stamp ink is expelled through the pad 42 and thence through cutout portions of the stencil to cause an imprinting.

The modified form of rocker hand printer shown in .FIGURES `8 and 9 is provided with a handle 55 which again has a dual function of an ink reservoir and a handle. The handle 55 is shown as a squeeze type bottle which is inverted and has its discharge end removably fastened to a bushing 56 forming a unitary part of a metal plate 57. A plastic body similar to the plastic bodies 14 and 33 constitutes the base member for the hand printer. This body `member 58 has a plurality of depending projections 59 which are of generaly uniform length. The projections have their roots lying on a convexly curved undersurface 6 of the plastic body 58 so that the resultant hand printer is of the rocker type even through the projections are substantially the same height. This differs from the rocker printer of FIGURES 5, 6 and 7 because in that printer the projections were of varying height and all projected downwardly from a relatively flat plane. The projections 59 are preferably conical in shape with spherical apices on the undersides in the same manner as the projections employed in both of the hand printers previously described. The lateral side edges of the plastic body 58 come to sharp line edges 60 and 61 corresponding to the angled line edges 38 and 39 of the plastic body 33. A compressible foamed elastomer pad 62 is placed against the underside of the projections of the curved bottom plastic body 58 as shown in FIGURE 8. A fabric covering 63 is provided with V-shaped clips along each lateral side for cooperative attachment to the angled side edges 60 and 61 for holding the fabric covering and its included foamed pad 62 in fixed position on the underside in the body 58. As best shown in FIGURE 9 a threaded stud 66 is shown molded withinthe plastic body 58 to provide for the removable attachment of the handle 55, bushing 56 and metal plate 57 to the body 58. End walls 67 are provided on each end of the plastic body 58 and are comparable to the end Walls 46 and 47 for the rocker printer of FIG- URES 5, 6 and 7. Again these end walls 67 prevent the outward flow of ink through the ends of the hand printer.

' In the operation of the rocker printer of FIGURES 8 and 9 ink flows from the hand-reservoir 55 through a passageway 68 in the bushing '56 and thence downward-ly through a passageway 69 in the central portion of the plastic body member 58. From here ink lls a reservoir 70 which comprises the spaces around the projections 59 and between the plastic body 58 and the foamed pad 62. Pressure on the pad causes ink to flow through the foamed pad 62 in the same manner as ink flows through the foamed pads 20 and 42 of the previously described hand printers. This means that a stencil carried on the underside of the cloth covering 63 will be supplied with ink uniformly over its full surface so that regardless of the location of the stencil cutouts, there will be a uniform amount of ink for imprinting of the contents of the stencil. The operation of both rocker type hand printers differs from the operation pf the flat printer in that the user preferably starts making contact of the rocker printer with the material to be lmprinted along one side and rocks the hand printer to the other side over the convex curve of the underside.

It is believed that herein is provided a simple, e'icient and economical hand stamp which has a minimum number of parts and yet produces clean, sharp, uniform imprinting of cut stencils which are imprinted thereby.

I am aware that numerous details of construction may be varied throughout a wide range without departing from the principles disclosed herein and I therefore do not propose limiting the patent granted herein otherwise than as necessitated by the appended claims.

What is claimed is:

1. A stencil printing hand stamp comprising a backing plate member of a generally rigid material, said backing plate member having a plurality of projections of uniform height and gradually diminishing cross sectional area arranged in closely spaced apart position over one surface of said backing plate member, said backing plate member having a peripheral rim of substantially the same height as the projections and on the same side of said backing plate member as the projections, a compressible pad adhesively secured to said peripheral rim and to the apices of the lprojections on the backing plate member and means for supplying ink to the chamber defined between the backing plate member and the compressible pad in and around the projections and Within the contines of the peripheral rim -of the backing plate member.

2. A stencil printing hand stamp comprising a backing plate member of a generally rigid material, said backing plate member having a plurality of projections of uniform height and gradually diminishing cross sectional area forming apices on the tops thereof, said projections arranged in closely spaced apart position over one surface of said backing plate member, said backing plate member having a peripheral skirt formed int-egrally with and around said backing plate member and having substantially the `same height and disposed on the same si-de of the backing plate member as the plurality of projections, a exible pad secured to said peripheral skirt and to the apices of the projections on the backing plate member and means for supplying ink to the chamber defined between the backing plate member and the flexible pad in and around the projections and within the confines of the peripheral skirt of the backing path member.

3. A stencil printing hand stamp comprising a backing plate member of a generally rigid material, said backihg plate member having a plurality of generally conical shaped projections with rounded apices and the projections arranged in closely spaced apart position over one surface of said backing plate, said backing plate member having a peripheral edge, a compressible pad secured to said peripheral edge and to the apices of the projections on the backing plate member, said backing plate member having an opening through substantially the center thereof, and squeeze ink bottle means adjoining the other side of said backing plate member over said opening for supplying ink to the chamber defined between the backing plate member and t-he compressible pad in and around the projections and within the contines of the peripheral rim. 4. A stencil printing hand stamp comprising a supporting frame in the form of an inverted shallow tray with an opening in the center thereof, a sleeve member axed to said frame and projecting upwardly from said opening, a combination squeeze bottle and handle removably joined to said sleeve, a backing plate of substantially the same size as the inverted shallow tray, means removably fastening said backing plate within said shallow tray, said 'backing plate including a plurality of closely spaced apart projections on the underside thereof, said projections having a shape which gradually `diminishes in cross sectional area, sai-d backing plate further including a peripheral rim around the sides thereof, a compressible pad of substantially the same size as the backing plate, means securing said compressible pad to the apices of the projections and the peripheral rim of the backing plate, a fabric covering for said compressible pad arranged and constructed to be secured around the sides of the peripheral rim of the backing plate, the depending skirt of the shallow tray arranged to cover the juncture of fabric to backing plate, said backing plate being provided with an opening therethrough in alignment with the opening in the shallow tray, whereby the hand stamp defines a chamber between the backing plate and the compressible pad having the numerous projections therewithin so that when ink from the squeeze bottle is forced downwardly through the opening it will pass around the projections and fill the full :space of the defined chamber for subsequent expression through the compressible pad to imprint cut stencils which may be placed on the underside of the fabric covered compressible pad.

5. A stencil printing hand stamp comprising a supporting frame in the form of an inverted shallow tray with an opening in the center thereof, a sleeve member affixed to :said frame Vand projecting upwardly from said opening, :a combination squeeze bottle and handle removably joined to said sleeve, a backing plate of substantially the same size as the inverted shallow tray, means removably fastening said backing plate within said shallow tray, said backing plate including a plurality of closely spaced apart projections on the underside thereof, said projections having a shape which gradually diminishes in cross sectional area and are of uniform height, said backing plate further including a peripheral rim depending around the sides thereof, and being of a height substantially the same as the height of the projections such that the lower edge of the rim and the apices of the projections lie in a single plane, a compressible pad of substantialy the same size as the backing plate, means adhesively securing said compressible pad to the apices of the projections and the lower edge of the peripheral rim of the backing plate, a fabric covering for said compressible pad arranged and constructed to be adhesively secured around the sides of the peripheral rim of the backing plate, the depending skirt of the shallow tray arranged to cover the juncture of fabric to backing plate, said backing plate being provided with an opening therethrough in alignment with the opening in the shallow tray, whereby the hand stamp defines a chamber between the backing plate and the compressible pad having the numerous projections therewithin so that when ink from the squeeze bottle is forced downwardly through the opening it will pass around the projections and fill the full space of the defined chamber for subsequent expression through the compressible pad to imprint cut stencils which may be placed on the underside of the fabric covered compressible pad.

6. A stencil printing hand stamp comprising a supporting frame in the form of an inverted shallow tray with an opening in the center thereof, a sleeve member affixed to said frame and projecting upwardly from said opening, a combination squeeze bottle and handle removably joined to said sleeve, a backing plate of substantially the same size as the inverted shallow tray, means removably fastening said backing plate within said shallow tray, said backing plate including a plurality of closely spaced apart projections on the underside thereof, said projections being of uniform height and diminishing in cross sectional area as they progress away from the backing plate and having rounded tops, said backing plate further including a peripheral rim depending around the sides thereof and being of a height substantially the same as the height of the projections such that the lower edge of the rim and the lower minimum area rounded tops of the projections form a single plane, a compressible pad of substantially the same size as the backing plate, means adhesively securing said compressible pad to the rounded tops of the projections and the lower edge of the peripheral rim of the backing plate, a fabric covering for said compressible pad arranged and constructed to be adhesively secured around the sides of the backing plate and with the depending skirt of the shallow tray covering the juncture of fabric to backing plate, said backing plate being provided with an opening therethrough in alignment with the opening in the shallow tray, whereby the hand stamp defines a chamber between the backing plate and the compressible pad having the numerous projections therewithin so that when ink from the squeeze bottle is forced downwardly through the opening it will pass around the projections and ll the full space of the defined chamber for subsequent expression through the compressible pad to imprint cut stencils which may be placed on the underside of the fabric covered compressible pad.

7. A stencil printing hand stamp comprising a backing member, a plurality of closely spaced apart projections formed integrally with and on one surface of said backing member, the outer ends of said projections defining a single plane, a compressible pad, means holding said compressible pad in position on the outer ends of said projections, and a fabric covering said compressible pad, and means attaching said fabric to said backing member, said projections being conical in shape, and of varying height to dene a convex curve, whereby the defined single plane is a convexly curved plane across the apices of the projections.

8. A stencil printing hand stamp comprising a backing plate member of a generally rigid material, said hacking plate member having a plurality of projections of gradually diminishing cross sectional area arranged in closely spaced apart position over one surface of said backing plate member, said backing plate member having a peripheral rim projecting outwardly on the same side of said backing plate member as the projections and to a height substantially the same as a plane through the apices of the projections, a cornpressible pad adhesively secured to said peripheral rim and to the apices of the projections on the backing plate member and means for supplying ink to the chamber dened between the backing plate member and the compressible pad in and around the projections and within the contines of the peripheral rim of the backing plate member.

References Cited UNITED STATES PATENTS 325,632 9/1885 Ryder 118-270X 5 2,600,413 6/1952 Mason et al lOl-125 2,765,737 10/1956 Thomas 101--125 2,919,642 1/1960 Mooney 101--125 FOREIGN PATENTS 307,487 7/ 1955 Switzerland.

WILLIAM B. PENN, Primary Examiner.

ROBERT E. PULFREY, Examiner.

H. P. EWELL, Assistant Examiner. 

8. A STENCIL PRINTING HAND STAMP COMPRISING A BACKING PLATE MEMBER OF A GENERALLY RIGID MATERIAL, SAID BACKING PLATE MEMBER HAVING A PLURALITY OF PROJECTIONS OF GRADUALLY DIMINISHING CROSS SECTIONAL AREA ARRANGED IN CLOSELY SPACED APART POSITION OVER ONE SURFACE OF SAID BACKING PLATE MEMBER, SAID BACKING PLATE MEMBER HAVING A PERIPHERAL RIM PROJECTING OUTWARDLY ON THE SAME SIDE OF SAID BACKING PLATE MEMBER AS THE PROJECTIONS AND TO A HEIGHT SUBSTANTIALLY THE SAME AS A PLANE THROUGH THE APICES OF THE PROJCTIONS, A COMPRESSIBLE PAD ADHESIVELY SECURED TO SAID PERIPHERAL RIM AND TO THE APICES OF THE PROJECTIONS ON THE BACKING PLATE MEMBER AND MEANS FOR SUPPLYING INK TO THE CHAMBER DEFINED BETWEEN THE BACKING PLATE MEMBER AND THE COMPRESSIBLE PAD IN AND AROUND THE PROJECTIONS AND WITHIN THE CONFINES OF THE PERIPHERAL RIM OF THE BACKING PLATE MEMBER. 